Variety by Maureen Ryan

It combines the dark stuff with a dollop of fizzy champagne. With a fraction of the resources of most American shows but a surfeit of ideas and frisky energy, this Lifetime drama supplies one of the most impressive debuts of the year.

Salon by Melanie McFarland

The drama’s dual flirtations with death and danger add an engrossing unpredictability to the mix that Dhavernas uses to her advantage.

Washington Post by Hank Stuever

It’s a serious and stylishly watchable drama, thanks mostly to Dhavernas’s capable performance of a morally ambiguous person with too many dangerous irons in the fire, and Ryan’s portrayal of a hurt-and-handsome lawman struggling to do his job, even though he’s in love with his suspect.

Los Angeles Times by Robert Lloyd

What ties it together, keeps it in line and most makes it go is Dhavernas.

The New York Times by Mike Hale

What makes the show different is the dark comedy of Mary and Des’s missions. ... The counterintuitive humor helps make up for the less wise choices, mostly involving the sexual tension between Mary and the cop who’s on her trail.

Entertainment Weekly by Jeff Jensen

The droll Dhavernas is good enough, but Mary Kills People needs to be sharper and bolder to really slay. [21 Apr 2017, p.59]

The Lincoln Journal Star by Jeff Korbelik

It’s more interested in whether she gets away with [killing people]--the “B” story is about an undercover cop trying to catch the doctor in the act.

TV Guide Magazine by Matt Roush

Mary's misadventures in the criminal underworld ultimately lack the thrills and moral complexity of better shows like Breaking Bad and Dexter. [17-30 Apr 2017, p.19]